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FLUOR CORPORATION INDEX TO CONSOLIDATED FINANCIAL STATEMENTS

UNITED STATES

SECURITIES AND EXCHANGE COMMISSION

Washington, D.C. 20549

Form 10-K/A

(Amendment No. 1)

☒	ANNUAL REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934

For the fiscal year ended December 31, 2025

☐	TRANSITION REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934

For the transition period from to

Commission file number:	1-16129

FLUOR CORPORATION

(Exact name of registrant as specified in its charter)

Delaware		33-0927079
(State or other jurisdiction of		(I.R.S. Employer
incorporation or organization)		Identification No.)
6700 Las Colinas Boulevard
Irving,	Texas	75039
(Address of principal executive offices)		(Zip Code)

469-398-7000

(Registrant’s telephone number, including area code)

Securities registered pursuant to Section 12(b) of the Act:Title of Each ClassTrading Symbol(s)Name of Each Exchange on Which RegisteredCommon Stock, $.01 par value per shareFLRNew York Stock Exchange

Securities registered pursuant to Section 12(g) of the Act:

None

Indicate by check mark if the registrant is a well-known seasoned issuer, as defined in Rule 405 of the Securities Act. Yes þ No o

Indicate by check mark if the registrant is not required to file reports pursuant to Section 13 or Section 15(d) of the Exchange Act. Yes o No þ

Indicate by check mark whether the registrant (1) has filed all reports required to be filed by Section 13 or 15(d) of the Exchange Act during the preceding 12 months (or for such shorter period that the registrant was required to file such reports), and (2) has been subject to such filing requirements for the past 90 days. Yes þ No o

Indicate by check mark whether the registrant has submitted electronically every Interactive Data File required to be submitted pursuant to Rule 405 of Regulation S-T (§232.405 of this chapter) during the preceding 12 months (or for such shorter period that the registrant was required to submit such files). Yes þ No o

Indicate by check mark whether the registrant is a large accelerated filer, an accelerated filer, a non-accelerated filer, a smaller reporting company or an emerging growth company. See the definitions of "large accelerated filer," "accelerated filer," "smaller reporting company" and "emerging growth company" in Rule 12b-2 of the Exchange Act.

Large accelerated filer	þ	Accelerated filer	o	Non-accelerated filer	o	Smaller reporting company	☐	Emerging growth company	☐

If an emerging growth company, indicate by check mark if the registrant has elected not to use the extended transition period for complying with any new or revised financial accounting standards provided pursuant to Section 13(a) of the Exchange Act. o

Indicate by check mark whether the registrant has filed a report on and attestation to its management's assessment of the effectiveness of its internal control over financial reporting under Section 404(b) of the Sarbanes-Oxley Act (15 U.S.C. 7262(b)) by the registered public accounting firm that prepared or issued its audit report. ☑

If securities are registered pursuant to Section 12(b) of the Act, indicate by check mark whether the financial statements of the registrant included in the filing reflect the correction of an error to previously issued financial statements. o

Indicate by check mark whether any of those error corrections are restatements that required a recovery analysis of incentive-based compensation received by any of the registrant’s executive officers during the relevant recovery period pursuant to §240.10D-1(b). o

Indicate by check mark whether the registrant is a shell company (as defined in Rule 12b-2 of the Exchange Act). Yes ☐ No ☑

As of June 30, 2025, the aggregate market value of the registrant's common stock held by non-affiliates of the registrant was approximately $8.2 billion based on the closing sale price as reported on the New York Stock Exchange.

As of January 31, 2026, 146,564,673 shares of the registrant’s common stock, $0.01 par value per share, were outstanding.

DOCUMENTS INCORPORATED BY REFERENCE
Portions of the Proxy Statement for the 2026 Annual Meeting of Stockholders are incorporated by reference into Part III of this Form 10-K.

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EXPLANATORY NOTE

This Amendment No. 1 on Form 10-K/A (this “Amendment”) amends our Annual Report on Form 10-K for the year ended December 31, 2025, originally filed on February 17, 2026 (the “Original Filing”). We are filing this Amendment to amend Item 15 of Part IV to include the consolidated financial statements of our significant equity investee, NuScale Power Corporation (“NuScale”) as of December 31, 2025 and 2024 and for the years ended December 31, 2025, 2024 and 2023 in accordance with Rule 3-09 of Regulation S-X. NuScale's consolidated financial statements, which were prepared by NuScale, were audited in accordance with the standards of the Public Company Accounting Oversight Board (United States), and were filed with NuScale's Annual Report on Form 10-K for the year ended December 31, 2025, on February 26, 2026. Additionally, in connection with the filing of this Amendment and pursuant to the rules of the Securities and Exchange Commission (the “SEC”), we are including with this Amendment new certifications of our principal executive officer and principal financial officer pursuant to Sections 302 and 906 of the Sarbanes-Oxley Act of 2002.

Except as described above, this Amendment does not modify or update in any way (i) the consolidated financial position, the results of operations or cash flows of Fluor or (ii) the disclosures in the Original Filing; nor does it reflect events occurring after the filing of the Original Filing. Accordingly, this Amendment should be read in conjunction with the Original Filing and any subsequent filings with the SEC.

Except as the context otherwise requires, the terms "Fluor" or the "Registrant" as used herein are references to Fluor Corporation and its predecessors and references to the "company," "we," "us," or "our" as used herein shall include Fluor Corporation, its consolidated subsidiaries and joint ventures.

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FLUOR CORPORATION

INDEX TO ANNUAL REPORT ON FORM 10-K/A

For the Fiscal Year Ended December 31, 2025

		Page
	PART IV
Item 15.	Exhibits and Financial Statement Schedules	2
Signatures		5

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PART IV

Item 15. Exhibits and Financial Statement Schedules

(a)Documents filed as part of the Original Filing:

1.Financial Statements:

Our consolidated financial statements at December 31, 2025 and 2024 and for each of the 3 years in the period ended December 31, 2025, together with the report of our independent registered public accounting firm on those consolidated financial statements are filed as part of the Original Filing on page F-1.

2.Financial Statement Schedules:

No financial statement schedules are presented since the required information is not present or not present in amounts sufficient to require submission of the schedule, or because the information required is included in the consolidated financial statements and notes thereto.

3.Exhibits:

Exhibit	Description
3.1	Amended and Restated Certificate of Incorporation of the registrant (incorporated by reference to Exhibit 3.1 to the registrant's Current Report on Form 8-K (Commission file number 1-16129) filed on May 8, 2012).
3.2	Amended and Restated Bylaws of the registrant (incorporated by reference to Exhibit 3.1 to the registrant's Current Report on Form 8-K (Commission file number 1-16129) filed on November 4, 2022).
4.1	Senior Debt Securities Indenture between Fluor Corporation and Wells Fargo Bank, National Association, as trustee, dated as of September 8, 2011 (incorporated by reference to Exhibit 4.3 to the registrant's Current Report on Form 8-K (Commission file number 1-16129) filed on September 8, 2011).
4.2	First Supplemental Indenture between Fluor Corporation and Wells Fargo Bank, National Association, as trustee, dated as of September 13, 2011 (incorporated by reference to Exhibit 4.4 to the registrant's Current Report on Form 8-K (Commission file number 1-16129) filed on September 13, 2011).
4.3	Second Supplemental Indenture between Fluor Corporation and Wells Fargo Bank, National Association, as trustee, dated as of June 22, 2012 (incorporated by reference to Exhibit 4.2 to the registrant's Registration Statement on Form S-3 (Commission file number 333-182283) filed on June 22, 2012).
4.4	Third Supplemental Indenture between Fluor Corporation and Wells Fargo Bank, National Association, as trustee, dated as of November 25, 2014 (incorporated by reference to Exhibit 4.1 to the registrant's Current Report on Form 8-K (Commission file number 1-16129) filed on November 25, 2014).
4.5	Fourth Supplemental Indenture between Fluor Corporation and Wells Fargo Bank, National Association, as trustee, dated as of March 21, 2016 (incorporated by reference to Exhibit 4.3 to the registrant's Current Report on Form 8-K (Commission file number 1-16129) filed on March 21, 2016).
4.6	Fifth Supplemental Indenture between Fluor Corporation and Wells Fargo Bank, National Association, as trustee, dated as of August 29, 2018 (incorporated by reference to Exhibit 4.1 to the registrant's Current Report on Form 8-K (Commission file number 1-16129) filed on August 29, 2018).
4.7	Indenture, dated August 10, 2023, between Fluor Corporation and U.S. Bank Trust Company, National Association, as trustee (incorporated by reference to Exhibit 4.1 to the registrant's Current Report on Form 8-K (Commission file number 1-16129) filed on August 11, 2023).
4.8	Form of 1.125% Convertible Senior Note due 2029 (included in Exhibit 4.7).
4.9	Description of Securities (incorporated by reference to Exhibit 4.7 to the registrant's Annual Report on Form 10-K (Commission file number 1-16129) filed on February 21, 2023).
10.1	Fluor Corporation Amended and Restated 2008 Executive Performance Incentive Plan (incorporated by reference to Exhibit 10.1 to the registrant's Current Report on Form 8-K (Commission file number 1-16129) filed on May 3, 2013).†
10.2	Form of Option Agreement (2017 grants) under the Fluor Corporation Amended and Restated 2008 Executive Performance Incentive Plan (incorporated by reference to Exhibit 10.6 to the registrant's Annual Report on Form 10-K (Commission file number 1-16129) filed on February 17, 2017).†
10.3	Fluor Corporation 2017 Performance Incentive Plan (incorporated by reference to Exhibit 10.1 to the registrant's Registration Statement on Form S-8 (Commission file number 333-217653) filed on May 4, 2017).†
10.4	Form of Option Agreement under the Fluor Corporation 2017 Performance Incentive Plan (incorporated by reference to Exhibit 10.16 to the registrant's Quarterly Report on Form 10-Q (Commission file number 1-16129) filed on May 3, 2018).†

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Exhibit	Description
10.5	Form of Option Agreement (2020 grant) under the Fluor Corporation 2017 Performance Incentive Plan (incorporated by reference to Exhibit 10.2 to the registrant's Quarterly Report on Form 10-Q (Commission file number 1-16129) filed on December 10, 2020).†
10.6	Fluor Corporation 2020 Performance Incentive Plan (incorporated by reference to Exhibit 99.1 to the registrant's Registration Statement on Form S-8 (Commission file number 333-251426) filed on December 17, 2020.†
10.7	Form of Option Agreement (2021 grant) under the Fluor Corporation 2020 Performance Incentive Plan (incorporated by reference to Exhibit 10.17 to the registrant's Annual Report on Form 10-K (Commission file number 1-16129) filed on February 22, 2022).†
10.8	Form of Option Agreement (2022 grant) under the Fluor Corporation 2020 Performance Incentive Plan (incorporated by reference to Exhibit 10.2 to the registrant's Quarterly Report on Form 10-Q (Commission file number 1-16129) filed on May 6, 2022).†
10.9	Form of Option Agreement (2023 grant) under the Fluor Corporation 2020 Performance Incentive Plan (incorporated by reference to Exhibit 10.1 to the registrant's Quarterly Report on Form 10-Q (Commission file number 1-16120) filed on May 5. 2023).†
10.10	Form of Option Agreement (2024 grant) under the Fluor Corporation 2020 Performance Incentive Plan (incorporated by reference to Exhibit 10.1 to the registrant's Quarterly Report on Form 10-Q (Commission file number 1-16120) filed on May 3. 2024).†
10.11	Form of Restricted Stock Unit Agreement (2023 grant) under the Fluor Corporation 2020 Performance Incentive Plan (incorporated by reference to Exhibit 10.2 to the registrant's Quarterly Report on Form 10-Q (Commission file number 1-16120) filed on May 5. 2023).†
10.12	Form of Restricted Stock Unit Agreement (2024 and 2025 grants) under the Fluor Corporation 2020 Performance Incentive Plan (incorporated by reference to Exhibit 10.2 to the registrant's Quarterly Report on Form 10-Q (Commission file number 1-16120) filed on May 3. 2024).†
10.13	Form of Performance Award (2023 grant) under the Fluor Corporation 2020 Performance Incentive Plan (incorporated by reference to Exhibit 10.3 to the registrant's Quarterly Report on Form 10-Q (Commission file number 1-16120) filed on May 5. 2023).†
10.14	Form of Performance Award (2024 and 2025 grants) under the Fluor Corporation 2020 Performance Incentive Plan (incorporated by reference to Exhibit 10.3 to the registrant's Quarterly Report on Form 10-Q (Commission file number 1-16120) filed on May 3. 2024).†
10.15	Form of Stock Growth Incentive Agreement under the Fluor Corporation 2020 Performance Incentive Plan (incorporated by reference to Exhibit 10.4 to the registrant's Quarterly Report on Form 10-Q (Commission file number 1-16120) filed on May 3. 2024).†
10.16	Fluor Executive Deferred Compensation Plan, as amended and restated effective April 21, 2003 (incorporated by reference to Exhibit 10.5 to the registrant's Annual Report on Form 10-K (Commission file number 1-16129) filed on February 29, 2008).†
10.17	Fluor 409A Executive Deferred Compensation Program, as amended and restated effective January 1, 2017 (incorporated by reference to Exhibit 10.16 to the registrant's Quarterly Report on Form 10-Q (Commission file number 1-16129) filed on November 2, 2017).†
10.18	Executive Severance Plan (incorporated by reference to Exhibit 10.7 to the registrant's Annual Report on Form 10-K (Commission file number 1-16129) filed on February 22, 2012).†
10.19	Offer Letter, dated October 30, 2020, between the registrant and David E. Constable (incorporated by reference to Exhibit 10.26 to the registrant's Annual Report on Form 10-K (Commission file number 1-16129) filed on February 26, 2021).†
10.20	Option Agreement, dated December 23, 2020, between the registrant and David E. Constable (incorporated by reference to Exhibit 10.27 to the registrant's Annual Report on Form 10-K (Commission file number 1-16129) filed on February 26, 2021).†
10.21	Restricted Stock Unit Agreement, dated December 23, 2020, between the registrant and David E. Constable (incorporated by reference to Exhibit 10.28 to the registrant's Annual Report on Form 10-K (Commission file number 1-16129) filed on February 26, 2021).†
10.22	Letter Agreement, effective as of July 2, 2025, between Fluor Corporation and James R. Breuer (incorporated by reference to Exhibit 10.1 to the registrant's Quarterly Report on Form 10-Q (Commission file number 1-16129) filed on November 7, 2025).†
10.23	Consulting Agreement, dated as of June 19, 2025, between FDEE Consulting, Inc. and John R. Reynolds (incorporated by reference to Exhibit 10.1 to the registrant's Quarterly Report on Form 10-Q (Commission file number 1-16129) filed on August 1, 2025).†

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Exhibit	Description
10.24	Consulting Agreement, effective as of July 2, 2025, between FDEE Consulting, Inc. and Joseph L. Brennan (incorporated by reference to Exhibit 10.2 to the registrant's Quarterly Report on Form 10-Q (Commission file number 1-16129) filed on November 7, 2025).†
10.25	Summary of Fluor Corporation Non-Management Director Compensation.* †
10.26	Form of Restricted Stock Unit Agreement granted to directors under the Fluor Corporation 2020 Performance Incentive Plan (incorporated by reference to Exhibit 10.32 to the registrant's Annual Report on Form 10-K (Commission file number 1-16129) filed on February 26, 2021).†
10.27	Fluor Corporation Deferred Directors' Fees Program, as amended and restated effective January 1, 2002 (incorporated by reference to Exhibit 10.9 to the registrant's Annual Report on Form 10-K (Commission file number 1-16129) filed on March 31, 2003).†
10.28	Fluor Corporation 409A Director Deferred Compensation Program, as amended and restated effective as of November 2, 2016 (incorporated by reference to Exhibit 10.22 to the registrant's Annual Report on Form 10-K (Commission file number 1-16129) filed on February 17, 2017).†
10.29	Directors' Life Insurance Summary (incorporated by reference to Exhibit 10.12 to the registrant's Registration Statement on Form 10/A (Amendment No. 1) (Commission file number 1-16129) filed on November 22, 2000).†
10.30	Form of Indemnification Agreement entered into between the registrant and each of its directors and executive officers (incorporated by reference to Exhibit 10.21 to the registrant's Annual Report on Form 10-K (Commission file number 1-16129) filed on February 25, 2009).
10.31	Form of Change in Control Agreement entered into between the registrant and each of its executive officers (incorporated by reference to Exhibit 10.1 to the registrant's Current Report on Form 8-K (Commission file number 1-16129) filed on June 29, 2010).†
10.32	$2,200,000 Fourth Amended and Restated Revolving Loan and Letter of Credit Facility Agreement dated as of February 14, 2025, among Fluor Corporation, the Lenders thereunder, BNP Paribas, as Administrative Agent and an Issuing Lender, Bank of America, N.A., as Syndication Agent, and Citibank, N.A. and Wells Fargo Bank, National Association, as Co-Documentation Agents (incorporated by reference to Exhibit 10.1 to the registrant's Quarterly Report on Form 10-Q (Commission file number 1-16129) filed on May 2, 2025).
10.33	Form of Capped Call Confirmation (incorporated by reference to Exhibit 10.2 to the registrant's Current Report on Form 8-K (Commission file number 1-16129) filed on August 11, 2023).
19.1	Insider Trading Policy (incorporated by reference to Exhibit 19.1 to the registrant's Annual Report on Form 10-K (Commission file number 1-16129) filed on February 18, 2025).
21.1	Subsidiaries of the registrant.*
23.1	Consent of Independent Registered Public Accounting Firm.*
23.2	Consent of Independent Registered Public Accounting Firm of NuScale Power Corporation.**
31.1	Certification of Chief Executive Officer pursuant to Section 302 of the Sarbanes-Oxley Act of 2002.*
31.2	Certification of Chief Financial Officer pursuant to Section 302 of the Sarbanes-Oxley Act of 2002.*
31.3	Certification of Chief Executive Officer pursuant to Section 302 of the Sarbanes-Oxley Act of 2002.**
31.4	Certification of Chief Financial Officer pursuant to Section 302 of the Sarbanes-Oxley Act of 2002.**
32.1	Certification of Chief Executive Officer pursuant to Section 906 of the Sarbanes-Oxley Act of 2002.*
32.2	Certification of Chief Financial Officer pursuant to Section 906 of the Sarbanes-Oxley Act of 2002.*
32.3	Certification of Chief Executive Officer pursuant to Section 906 of the Sarbanes-Oxley Act of 2002.**
32.4	Certification of Chief Financial Officer pursuant to Section 906 of the Sarbanes-Oxley Act of 2002.**
95.1	Mine Safety Disclosure.*
97.1	Compensation Recoupment (Clawback) Policy for Executive Officers (incorporated by reference to Exhibit 97.1 to the registrant's Annual Report on Form 10-K (Commission file number 1-16129) filed on February 20, 2024).†
99.1	Consolidated financial statements of NuScale Power Corporation as of December 31,2025 and 202 4 and for the years ended December 31, 202 5 , 202 4 and 202 3 (incorporated by reference to Item 8 of NuScale Power Corporation's Annual Report on Form 10-K for the fiscal year ended December 31, 202 5 filed with the SEC on February 26 , 202 6 , File No. 001-04321). No other part of the NuScale Power Corporation Annual Report on Form 10-K is being incorporated by reference.
101.INS	Inline XBRL Instance Document.*
101.SCH	Inline XBRL Taxonomy Extension Schema Document.*
101.CAL	Inline XBRL Taxonomy Extension Calculation Linkbase Document.*
101.LAB	Inline XBRL Taxonomy Extension Label Linkbase Document.*

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Exhibit	Description
101.PRE	Inline XBRL Taxonomy Extension Presentation Linkbase Document.*
101.DEF	Inline XBRL Taxonomy Extension Definition Linkbase Document.*
104	The cover page from the Company's 2025 10-K/A for the year ended December 31, 2025, formatted in Inline XBRL (included in the Exhibit 101 attachments).**

_______________________________________________________________________________

* Exhibit incorporated by reference to the corresponding exhibit filed with the Original Filing.

** Exhibit filed herewith.

† Management contract or compensatory arrangement.

Attached as Exhibit 101 to the Original Filing are the following documents formatted in XBRL (Extensible Business Reporting Language): (i) the Consolidated Statement of Operations for the years ended December 31, 2025, 2024 and 2023, (ii) the Consolidated Balance Sheet at December 31, 2025 and December 31, 2024, (iii) the Consolidated Statement of Cash Flows for the years ended December 31, 2025, 2024 and 2023 and (iv) the Consolidated Statement of Equity for the years ended December 31, 2025, 2024 and 2023.

SIGNATURES

Pursuant to the requirements of Section 13 or 15(d) of the Securities Exchange Act of 1934, the registrant has duly caused this report to be signed on its behalf by the undersigned, thereunto duly authorized.

FLUOR CORPORATION
By:	/s/ JOHN C. REGAN
	John C. Regan,<br><br>Chief Financial Officer

March 2, 2026

Document

Exhibit 23.2

Consent of Independent Registered Public Accounting Firm

We consent to the incorporation by reference in the following Registration Statements:

1)Registration Statement (Form S-8 No. 333-148269) pertaining to the Fluor 409A Executive Deferred Compensation Program,

2)Registration Statement (Form S-8 No. 333-148270) pertaining to the Fluor Corporation 409A Deferred Directors' Fees Program,

3)Registration Statement (Form S-8 No. 333-188379) and Post-Effective Amendment No. 1 thereto, pertaining to the Fluor Corporation Amended and Restated 2008 Executive Performance Incentive Plan,

4)Registration Statement (Form S-8 No. 333-217653) pertaining to the Fluor Corporation 2017 Performance Incentive Plan,

5)Registration Statement (Form S-8 No. 333-226546) pertaining to the Fluor Corporation 409A Executive Deferred Compensation Program,

6)Registration Statement (Form S-8 No. 333-251426) pertaining to the Fluor Corporation 2020 Performance Incentive Plan,

7)Registration Statement (Form S-8 No. 333-260823) pertaining to Executive Officer Inducement Awards, and

8)Registration Statement (Form S-3 No. 333-285023) and related Prospectus of Fluor Corporation pertaining to the registration of its debt securities, common stock, preferred stock, depositary shares, warrants, purchase contracts and units;

of our report dated February 26, 2026, with respect to the consolidated financial statements of NuScale Power Corporation, included in this Annual Report (Form 10-K/A) of Fluor Corporation for the year ended December 31, 2025.

/s/ Ernst & Young LLP

Houston, TX

March 2, 2026

Document

Exhibit 31.3

CERTIFICATION OF CHIEF EXECUTIVE OFFICER

PURSUANT TO RULE 13a-14(a) OR RULE 15d-14(a)

OF THE SECURITIES EXCHANGE ACT OF 1934

I, James R. Breuer, certify that:

1. I have reviewed this Amendment No. 1 to the annual report on Form 10-K of Fluor Corporation;

2. Based on my knowledge, this report does not contain any untrue statement of a material fact or omit to state a material fact necessary to make the statements made, in light of the circumstances under which such statements were made, not misleading with respect to the period covered by this report; and

3. Based on my knowledge, the financial statements, and other financial information included in this report, fairly present in all material respects the financial condition, results of operations and cash flows of the registrant as of, and for, the periods presented in this report;

March 2, 2026	By:	/s/ James R. Breuer
		James R. Breuer
		Chief Executive Officer

Document

Exhibit 31.4

CERTIFICATION OF CHIEF FINANCIAL OFFICER

PURSUANT TO RULE 13a-14(a) OR RULE 15d-14(a)

OF THE SECURITIES EXCHANGE ACT OF 1934

I, John C. Regan, certify that:

I have reviewed this Amendment No. 1 to the annual report on Form 10-K of Fluor Corporation;

March 2, 2026	By:	/s/ John C. Regan
		John C. Regan
		Chief Financial Officer

Document

Exhibit 32.3

CERTIFICATION OF CHIEF EXECUTIVE OFFICER

PURSUANT TO RULE 13a-14(b) OR RULE 15d-14(b)

OF THE SECURITIES EXCHANGE ACT OF 1934

AND 18 U.S.C. SECTION 1350

In connection with Amendment No. 1 to the Annual Report of Fluor Corporation (the “Company”) on Form 10-K for the period ended December 31, 2025, as filed with the Securities and Exchange Commission on the date hereof (the “Report”), I, David E. Constable, Chief Executive Officer of the Company, certify, for purposes of 18 U.S.C. Section 1350, as adopted pursuant to Section 906 of the Sarbanes-Oxley Act of 2002, that to my knowledge:

• the Report fully complies with the requirements of Section 13(a) or 15(d) of the Securities Exchange Act of 1934, as amended; and

• the information contained in the Report fairly presents, in all material respects, the financial condition and results of operations of the Company.

March 2, 2026	By:	/s/ James R. Breuer
		James R. Breuer
		Chief Executive Officer

A signed original of this written statement required by 18 U.S.C. Section 1350 has been provided to the Company and will be retained by the Company and furnished to the Securities and Exchange Commission or its staff upon request.

Document

Exhibit 32.4

CERTIFICATION OF CHIEF FINANCIAL OFFICER

PURSUANT TO RULE 13a-14(b) OR RULE 15d-14(b)

OF THE SECURITIES EXCHANGE ACT OF 1934

AND 18 U.S.C. SECTION 1350

In connection with Amendment No. 1 to the Annual Report of Fluor Corporation (the “Company”) on Form 10-K for the period ended December 31, 2025, as filed with the Securities and Exchange Commission on the date hereof (the “Report”), I, John C. Regan, Chief Financial Officer of the Company, certify, for purposes of 18 U.S.C. Section 1350, as adopted pursuant to Section 906 of the Sarbanes-Oxley Act of 2002, that to my knowledge:

• the Report fully complies with the requirements of Section 13(a) or 15(d) of the Securities Exchange Act of 1934, as amended; and

• the information contained in the Report fairly presents, in all material respects, the financial condition and results of operations of the Company.

March 2, 2026	By:	/s/ John C. Regan
		John C. Regan
		Chief Financial Officer